More than 4,770 women took part in Northamptonshire's 5k Cancer Research UK Race for Life, and organisers estimated they raised up to £394,000 towards help fight the disease.
Participants jogged, walked or ran around the course, all wearing badges on their backs saying who they were running for . . . whether it was for mum, dad, grandma or just for hope.
This was the second time the race had been held at Silverstone and Helen Nassau, the main organiser of the event, said it went brilliantly.
She said: "We are slightly under last year's total but we are still absolutely delighted with the result.
It's always good to see everything come together.
The women who took part have worked so hard to train for this.
It's a brilliant atmosphere."
And while storms filled the skies in the minutes leading up to the race, the weather wasn't enough to dampen the runners' spirits.
Ms Nassau added: "When the storm came it was early enough for us to shelter everyone in the garages.
It's made it a little bit cooler and more pleasant for the runners, too."
Cancer Research UK has organised a 10k race at Althorp on October 14. For more information log on to www.cancerresearchuk.org/10k.
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